and you want to filter the first column, and print anything that is not numeric, the following sed directives will work, thanks to excellent answers on stackoverflow. The following example looks also for a blank second column.

{
/^"[0-9]+[^0-9",]+[0-9]*",/p
/^"[0-9]+",""/p
}

The part the confused me was including “ and , as part of the negated character class. So, I’m still learning regexes, and will be even more now that I’m doing more Perl development.